The MAX3987 is a 4-channel receive and transmit equalizer (EQ). It compensates for transmission medium losses encountered with FR4 stripline/microstrip and/or
high-speed cable. The device can be used at the beginning, middle, or end of a channel. The input equalization requires no setting, and the output preemphasis (PE) is programmable.
For each channel, the preemphasis level, output drive level, output polarity, and powering down of unused outputs are programmable through an I²C serial interface. It can also be configured globally through pins.
The device operates from a 2.5V or 3.3V supply, and is packaged in a 7mm x 7mm, 48-pin TQFN.
Key Features
Applications/Uses
Up to 8.5 NRZ Data Speed
Receive Equalization Up to 30in FR4
Preemphasis Drive Up to 30in FR4
Global and Individual Programming of Preemphasis, Output Drive Levels, Polarity Inversion, and Offset Cancellation
Signal Detect and Internal Output Squelch
Compliant with SAS/SATA Revision 2.x OOB
Coding Independent, 8B/10B, 64B/66B, Scrambled, and Others
Differential CML Data-Output Drive
I²C Serial Interface and Pin Programmable
Software Power-Down of Unused Outputs
0.5W Typical Power Dissipation for Drive Level 1 at VCC = 2.5V
High-Performance, Lead-Free, 7mm x 7mm, 48-Pin TQFN Package
